main: fix an Out-of-bounds access
main: fix an Out-of-bounds access

Coverity:
CID 739670 (#1 of 1): Out-of-bounds access (OVERRUN)
At (46): Overrunning struct type in_addr of 4 bytes by passing it to a
         function which accesses it at byte offset 15 using argument
         "16UL".

Signed-off-by: Ferry Huberts <66e11f9f5d965b69497c7e73d5e808f8b13c1218@pelagic.nl>

acinonyx/olsrd,nolith/olsrd,nolith/olsrd,nolith/olsrd,ninuxorg/olsrd,zioproto/olsrd,sebkur/olsrd,cholin/olsrd,acinonyx/olsrd,tdz/olsrd,diogomg/olsrd,diogomg/olsrd-binary-heap,diogomg/olsrd,sebkur/olsrd,diogomg/olsrd-binary-heap,cholin/olsrd,ninuxorg/olsrd,tdz/olsrd,ninuxorg/olsrd,cholin/olsrd,tdz/olsrd,sebkur/olsrd,diogomg/olsrd-binary-heap,acinonyx/olsrd,tdz/olsrd,diogomg/olsrd-binary-heap,zioproto/olsrd,acinonyx/olsrd,nolith/olsrd,diogomg/olsrd,sebkur/olsrd,sebkur/olsrd,diogomg/olsrd,cholin/olsrd,acinonyx/olsrd,nolith/olsrd,sebkur/olsrd,diogomg/olsrd,zioproto/olsrd,ninuxorg/olsrd,ninuxorg/olsrd,zioproto/olsrd,diogomg/olsrd-binary-heap,diogomg/olsrd-binary-heap,tdz/olsrd,diogomg/olsrd-binary-heap,diogomg/olsrd,zioproto/olsrd,cholin/olsrd,diogomg/olsrd